| HELIOGRAPHED | • heliographed v. Simple past tense and past participle of heliograph. • HELIOGRAPH v. to signal by heliograph. |
| HEMICHORDATE | • hemichordate n. (Biology) Any of many marine worms, of the phylum Hemichordata, that have a primitive notochord. • hemichordate adj. Of, pertaining to, or characteristic of these animals. • HEMICHORDATE n. a kind of marine worm. |
| HEXACHLORIDE | • hexachloride n. (Chemistry) Any chloride having six chlorine atoms. • HEXACHLORIDE n. a chloride containing six atoms of chlorine. |
| HEMICHORDATES | • hemichordates n. Plural of hemichordate. • HEMICHORDATE n. a kind of marine worm. |
| HERMAPHRODITE | • hermaphrodite n. An individual or organism possessing ambiguous sexual organs, typically including both types of gonads. • hermaphrodite n. A person or thing possessing two opposing qualities. • hermaphrodite n. (Nautical) A hermaphrodite brig. |
| HEXACHLORIDES | • hexachlorides n. Plural of hexachloride. • HEXACHLORIDE n. a chloride containing six atoms of chlorine. |
| HORSERADISHES | • horseradishes n. Plural of horseradish. • horse-radishes n. Plural of horse-radish. • HORSERADISH n. a tall coarse white-flowered herb of the mustard family. |
| DICHLOROETHANE | • dichloroethane n. (Chemistry) Either of two isomeric organochlorides with the molecular formula C2H4Cl2: 1,1-dichloroethane… • DICHLOROETHANE n. a colorless toxic liquid compound that is used chiefly as a solvent. |
| HEMISPHEROIDAL | • hemispheroidal adj. Approximating a hemisphere in shape. • HEMISPHEROIDAL adj. in the form of a half-sphere. |
| HERMAPHRODITES | • hermaphrodites n. Plural of hermaphrodite. • HERMAPHRODITE n. a human being, animal or plant with the organs of both sexes. |
| HYDROCEPHALIES | • hydrocephalies n. Plural of hydrocephaly. • HYDROCEPHALY n. an accumulation of serous fluid within the cranial cavity, also HYDROCEPHALUS. |
| HYDROTHERAPIES | • hydrotherapies n. Plural of hydrotherapy. • HYDROTHERAPY n. therapy involving the use of water. |
| DICHLOROETHANES | • dichloroethanes n. Plural of dichloroethane. • DICHLOROETHANE n. a colorless toxic liquid compound that is used chiefly as a solvent. |
| DICHLOROMETHANE | • dichloromethane n. (Organic chemistry) The partially halogenated hydrocarbon CH2Cl2 widely used as a solvent. • DICHLOROMETHANE n. a noxious colourless liquid widely used as a solvent, e.g. in paint strippers. |